Alexander Hernandez was born on May 12, 1980, in Sylmar, Los Angeles, California. He grew up in a city that is known for its diverse culture and close-knit communities. Not much is publicly known about his childhood or family life. However, records show that he got into trouble with the law at a young age.

In 2004, Hernandez faced his first legal issues. He had convictions for vandalism, drug possession, and weapons offenses. These early incidents marked the beginning of a troubled life that would lead to further conflicts with the law. Over the years, he continued to encounter legal problems, indicating a pattern of behavior that would later escalate.

In 2010, a significant event happened in his life. His former girlfriend filed a restraining order against him. She expressed fear for the safety of herself and her children, which suggests that their relationship was filled with tension and conflict.

In June 2014, Hernandez was arrested again. This time, it was for threatening his cousin with a knife. However, prosecutors decided not to charge him for this incident.

On March 14, 2014, Alexander Hernandez shot and killed Sergio Sanchez while they were driving on the 210 Freeway in Sylmar. Sanchez was found dead in his car after the incident.

Later, on April 27, 2014, a man was injured from a gunshot while sitting in his car parked in front of an apartment building in Pacoima. On May 11, 2014, Hernandez shot a 19-year-old man during a car-to-car shooting in Northridge. The young man, who had just dropped off his girlfriend after prom, was left partially paralyzed.

On June 15, 2014, a man was shot in the arm on the 210 Freeway. In August 2014, Hernandez went on a five-day shooting spree, committing seven shootings with a shotgun. On August 20, he shot a 42-year-old woman in Atwater Village as she exited the freeway. On the same day, he also shot at three dogs, killing two.

The following day, August 21, Hernandez fatally shot Gildardo Morales, a 59-year-old man driving to work in Pacoima. On August 22, he shot at a couple in their pickup truck in West Hollywood, but they escaped unharmed.

On August 24, 2014, Hernandez shot into a car with the Franco family inside, killing 22-year-old Mariana Franco and critically injuring her parents while her siblings were unharmed. Later that day, Michael Planells, 29, was fatally shot while looking for recyclable items at Sylmar Recreational Center. Shortly after, Hernandez shot and killed 59-year-old Gloria Tovar as she sat in her car in Pacoima.

Hernandez was arrested on the evening of August 24, 2014, after he barricaded himself in his home. The police found the shotgun used in the shootings at his residence. Initially, he was charged only with the August shootings, but he was linked to earlier attacks in 2015.

His trial did not start until 2022 due to questions about his mental competency and delays from the COVID-19 pandemic. On May 25, 2022, he was sentenced to life imprisonment without the possibility of parole after being found guilty of five counts of murder, 11 counts of attempted murder, and several other charges. He is currently incarcerated in Calipatria State Prison.